Narrow-sense heritability is defined as:
a. the total genetic variation divided by the total phenotypic variation.
b. the total additive genetic variation divided by the total phenotypic variation.
c. the total dominance genetic variation divided by the total phenotypic varia-tion.
d. the total additive genetic variation divided by the total dominance variation.
e. the total epistatic genetic variation divided by the total dominance variation.
B
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Match the term on the left with its definition or description on the right.
A) energy from carbon, carbon from sunlight B) electron donor is water C) energy from sunlight, carbon from organic sources D) electron donor is carbon dioxide E) energy from sunlight, carbon from CO2 F) light-dependent generation of NADPH G) use electron donors such as sulfide and thiosulfate 1) photoreduction 2) photoheterotrophs 3) photoautotrophs 4) oxygenic phototrophs 5) anoxygenic phototrophs
Most microorganisms are pathogenic and harmful to the human body.
a. true b. false
Scientists study microorganisms on Earth today to search for life forms elsewhere, as well as to explore the origins of life on Earth. These microorganisms that are studied are referred to as ________.
A. extirpated B. extant C. existing D. extinct
Which of the following would be an effective approach to a new cancer therapy?
A. finding a way to stabilize p53 specifically in tumor cells B. preventing nucleotide synthesis in tumor cells C. inactivating the HER2 receptor on tumor cells D. inhibiting growth of new blood vessels with endostatin E. All of the above would help to fight cancer.